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2. Thermographic printing - Wikipedia

   en.wikipedia.org/wiki/Thermographic_printing

   Thermographic printing refers to two types of printing, both of which rely on heat to create the letters or images on a sheet of paper. The simplest type of thermography is where the paper has been coated with a material that changes colour on heating. This is called thermal printing and was used in older model fax machines and is used in most ...

3. Thermochromic ink - Wikipedia

   en.wikipedia.org/wiki/Thermochromic_ink

   Thermochromic ink (also called thermochromatic ink) is a type of dye that changes color in response to a change in temperature. [1] [2] [3] It was first used in the 1970s in novelty toys like mood rings, but has found some practical uses in things such as thermometers, product packaging, and pens. [4] The ink has also found applications within ...

4. Non-contact thermography - Wikipedia

   en.wikipedia.org/wiki/Non-contact_thermography

   Non-contact thermography, thermographic imaging, or medical thermology is the field of thermography that uses infrared images of the human skin to assist in the diagnosis and treatment of medical conditions. Medical thermology is sometimes referred to as medical infrared imaging or tele-thermology and utilizes thermographic cameras.

5. Postage stamps and postal history of the United States

   en.wikipedia.org/wiki/Postage_stamps_and_postal...

   In February 1861, a congressional act directed that "cards, blank or printed. . .shall also be deemed mailable matter, and charged with postage at the rate of one cent an ounce." Private companies soon began issuing post cards, printed with a rectangle in the top right corner where the stamp was to be affixed. (The Post Office would not produce ...

6. Do Hedgehogs Make Good Pets? Yes, But There's a Catch - AOL

   www.aol.com/hedgehogs-good-pets-yes-theres...

   The real question is, do hedgehogs make good pets or not? The short answer is, yes, they can - but there's a catch. Actually, there's several big catches, which is why we should break this ...

7. With French fans cheering every stroke, Marchand cruises to ...

   www.aol.com/news/french-fans-cheering-every...

   With a boisterous crowd cheering him on, Léon Marchand began his home Olympics by cruising to the fastest time in the preliminaries of the 400-meter individual medley Sunday. The 22-year-old ...